User blog comment:Tinachou28/Haha./@comment-15575766-20150424145126

It puts unnecessary things in wiki activity and recent changes. Users like to use these pages to see what's recent, not what's months old. This is the main reason.

Bloons Conception Wiki is one of the wikias that will go a bit tougher on you if you do too much necrobumping compared to some other wikias, but it should be fine if your replies are productive, constructive, and on-topic.

Also, necrobumps are just discouraged - only overuse will get you banned at worse, so I think you should be able to feel free to do it once in a while.