Sure I can.
You're still speculating.
This is what was said about Obama-care, and look where that got us

False analogy.
Lauda, it is fairly probable that account prices will increase if signatures are not enabled for the lower ranks. More farming would also take place and may produce more spam. However, there may be more accounts of the higher ranks and that may reduce their value (say if there are now around 1000 legendary accounts, if there were 10000 legendary accounts, the value would fall as more may be sold).
A value adjustment can be expected in this case. However, the situation becomes different to what we encounter now. Currently, the spammers are often able to start getting paid since the begging and one is incentivized to do this very early on. They would get nothing in most cases while they rank up (which takes time)
If there's a thread for reporting spam, unless it's self moderated and posts are archived and moved on that thread after the report is resolved, then that second idea would be open to spam and hard for forum staff and moderators to navigate through.
True. However, the OP could try and keep it clean.
Anyone else find it ironic that most people that comment on this are sig spammers/wearing a sig promoting something
It truly isn't. It comes down whether one has changed their posting habits after joining one.