apparently so.

it's not difficult to imagine who ever is behind to circumvent this solution lol. for the time being it works
 

 Definitely a clever way to block them. You just put in the pfp link into your mute words? 

 Yeah. 

But what do you do when spambots have no pfp? Lol 

 All the rest (wot, paid relays, mute list, pray, etc…) lol