"Warning: this topic has not been posted in for at least 60 days.
Unless you're sure you want to reply, please consider starting a new topic."
Two months without posting, in a deck, isn't that much. I think the necro advertisment should be delayed to six months instead of two.
Reason:
Why is that advertisment there? To prevent people (mostly noobs) to resurrect threads which were abandoned because they got useless, for example a deck that has been definitley improved in another thread. There are many useful decks that haven't been commented in 2 months and they are still being used and consulted. There is no need to suggest making a new thread for those decks, where the thread would be just a comment or a slight modification of the original deck.
I bet there are tons of threads that haven't been commented since August and they are still being consulted even if it's in a deck-by-cards search.
About non-deck sections, competitions and tournament stuff is locked so there's no problem with it, and I can't imagine a topic where more than 60 days without commenting would make it old.
tl;dr: Change the necro posting time no 6 months instrad of 2.