Gev gives creatures +1/+1 counters so long as an opponent has taken damage during the turn, so creatures with persist, such as Murderous Redcap, Puppeteer Clique, and Putrid Goblin, go infinite with any sac outlet
As mentioned earlier, fighting isnt attacking or blocking either, so even if both creatures have trample, no excess damage will be dealt to either player
Since the effect of a Signet is colorless, any mana-producing land or artifact can be used to pay for the Signet's cost
Combine these two things togethera community that is rightly angry about the lack of good reprints thanks to Wizards printing some astoundingly bad Masters sets over the past couple of years and a community that wrongly expects Magic cards to be unrealistically cheap, so cheap that Wizards couldn't stay in business if it actually met the demandsand it's hard to see how Wizards can easily solve the fake card problem, at least easily and cheaply
In multiplayer formats like Commander, you need answers to things