Apart from BTC and ETH, The whole crypto-space is verging on a scam.

Some people look at the cup half full some half empty.

Some people like to own whatever the hell tokens, some people like to hang on to their signatums.
Just leave them be. You can't police the internet, just like you can't police the whole crypto scene.
People who own Sigts are going to wish for more for the coin.

If SIGT is just a piece of crap coin to you, just move on, go fud on sex coins or whatever...
Whats the big deal?