Threads created in respect for somebody who is deceased will normally not have the 90 days rule applied to it. But those kind of threads are special case. Anyway, we all make a human mistake once in a while, and replying to an old thread is not the end of the world.
But i am not going to enforce the 90 days rule, before the Administrator Team has figured out if we should have one, and what the limit should be.
@Random American:
Long story short, when me, Colbyt and Accrete decided to create this forum, we agreed that the rules should be similar to those on V7N(we are all from the V7N webmaster forum before it got hacked and unusable. Me and Colbyt was Super Moderators and Accrete was an Administrator) unless the entire Administrator Team agreed on something else. We had a 90 days rule on V7N, that is why i enforced that rule here. But i need to figure out if we are going to have the same rule here, and if so, have it added to the rules.
[Update]The Administrator Team has now agreed on having a rule where we do not allow members to reply to threads where the last reply is older than 6 month. So please take the time to reread our
Rules and Guidelines 
[/Update]