I don't understand why begging the question is the most popular logical fallacy on the internet, but it is annoying.
The state that the smokebomb is useless because people just turn off particle effects. Then moving on to the conclusion that because the smokebomb is useless, no point in having it. You did not prove your point but used it to help strengthen your argument.
The point that it is overpowered is another begging the question fallacy.
The argument that it would lag peoples computers is simply a hasty generalization. What sample size are you using? You and your yes men on teamspeak? Look at the average gaming computer, it can easily run simple particle effects.
The viking ale point is an example of a strawman argument. "Because this obviously overpowered viking item shouldnt be implimented, the ninja item that is not over powered should not be implimented either." Obviously items implimented for roleplaying would make this a better Computer Roleplaying Game, as long as they are balanced.
Personally i think all this propaganda against a balanced smokebomb have been generated by the elite, anti-ninja media.