From personal experience running TAF, I can honestly say removing post counts and indicators affected by user activity will not reduce spam in the least. The only real way to reduce spam is to let people know it isn't tolerate and start handing out warnings and temporary bans, followed by permanent bans for serious repeat offenders.

The hardest part of it all though is determing what exactly you consider spam and what you don't.

A+ Certified PC Tech Guy/Seitentaisei