Hmm... And here we come to the problem "Who is guilty?" "What to do?" "What is correct?" Why following pattern is correct?

Hypercorrection means neglecting natural language laws in favor of formal rules (forced or cooked-up). For example, masculine кофе. Natural laws follows from practicability (which is often intuitive) and tradition while hyper-rules come from oversimplified model of the language when it is considered absolute.

For example someone may insist that "в лесе" is correct just because he learned at school only six cases.

So. The keyword is purpose. If someone wants to make fun and said "просрачить все полимеры", then "просрочить" is hypercorrection. If someone writes an official paper "просрачить" (because of the pattern) would be hypercorrection again. Everything is relative.

I don't think that chains of genitives or complicated sentences are the same phenomena. It is just a different style which is made for specific purposes. If someone write research report or legal paper in a colloquial manner, that will cause great problems not because of the snobbery of other people, but because such papers will be unusable - not enough exact. Still wrong style can be considered as hypercorrection sometimes...