Haha, that was a pretty funny story. So, now, a few corrections, which I will try to put into bold font.

One story

One day, my brother and I drove to bathe in the river. The place was beautiful: clear water, green forest around, soft yellow sand. But we saw a sign that said "no entry" for our car, but we ignored it.

After a good rest, we had to return. We remembered a police car at the nearest intersection. They had seen us, of course. And they would have taken us on our way back (if I understood correctly, of course back way can also be a small road)

But we saw, that sign "no entry" was not fixed and we took it down easily and threw it into the green trees near the road.

The police stopped us. Why did you violate the sign that says "no entry" ? Where was the sign ? We asked... They have proposed to go and check it. Ok, we had returned to place where road sign should have been (here must is almost like a deduction, but you, who took the sign down knows that it won't be there...not a deduction vs should have been=but it wasn't), together with policeman. And we all saw only empty place....
Policeman said: "It was removed, again..." But his voice was very unhappy and sad.

Do we need to bury Lenin or not?

Yes, Lenin must be buried, but 20 to 40 years from now.

Until people who grew up in USSR are no longer living, buring Lenin would be a humilation and an affront for them. It is the same as when the Christa Spasitelya cathedral was blown up. It was an affront for Christians. It is such fresh history right now that there is no need to touch it.We must avoid repeating historical mistakes, just like the lyrics in the revolution song say, "....." (???) Lets give proper respect to our history, our lives and the ideals of the people of the Soviet Union. Let's remember the spirit of the year of 1917 that indicate, "we have a dark past, our present is painful and we will have beautiful future." We need to get knowledge from our history and and be proud of it. We need to take pleasure from the present (and not struggle all of the time), find our independence and take a different path into the future.

Not everything is the same, and I'm not good enought at Russian (yet:) to try to read the original text...I just tried to correct some things to make it easier to read:)

Are need to bury Lenin or not ?

My own opinion, - yes Lenin must be buried, but in 20-40 years later.

Until people who grow up in USSR is living, make buring Lenin, will be humiliation and affront for they. It is same as Christa Spasitelya cathedral was exploded was affront for Christians, some time before. It is so fresh history now, no need to touch it now. We must avoid repeat historical mistakes, as words in revolution's song "до основания, а затем... (destruct anything to base, and than...)". Let's make more respect to our history, to lifes and ideals of Soviet Union people. Let's remember the spirit of 1917 year, that indicate "we have dark past, our present is painful, and we will have beautiful future ". We need get knowledge from our history and make respect and proud to our history, we need have pleasure from present time (don't struggle against difficults every time), and find our independent and unique way to the future.

Below original Russian text:
До тех пор пока живы люди выросшие в СССР, вынести Ленина из мавзолея, будет таким же унижением и оскорблением для них как и взрыв Храма Христа Спасителя для верующих людей в свое время. Это слишком живая история которую не нужно трогать сейчас. Не нужно повторять исторических ошибок с "до основания, а затем...". Будем же уважительно относиться к своей истории, к жизни и идеалам советских людей. Вспомним дух 17-го года о том, что "прошлое у нас тёмное, настоящее трудное, а будущее светлое". Стоит извлечь уроки из ошибок истории, и уважать и гордиться своим прошлым, получать удовольствие от жизни в настоящем ( а не вечно бороться с трудностями ради будущего) и искать свой индивидуальный путь в будущее...