I think we should avoid direct negativity against certain players (i.e. no need to directly point out their names in the game) in almost all aspects since it's definitely not what we should try to portray. I get it that some of these players are somewhat "anti-Smogon", but we're trying to promote a metagame, not bash on other opinions to make ours sound better.
In Denisss' case I can definitely see him being an admin, like Salemance said. I know that BP is generally looked down upon, but what Denisss did was work within the confines of the Single's ruleset to "abuse" a playstyle. He didn't break any rules, just an excess use of BP, and eventually Suspect Tests and the Council's decisions would interfere to make Smogon what it is today. He shouldn't be characterized as a bad person because the entire time he was following the rules.
Verlisify is a different case, but as I've said earlier we shouldn't point fingers and subjectively target people who are anti-Smogon. However, I would agree on some subtle references as a small laugh for those who understand. I'm all up for a Grunt to use Drifblim+Dunsparce.