While i can understand the temptation of creating a bubble where every opinion is aligned with my own and everyone is entertaining, i think it's a mistake. Ofc, if it's just a troll, by all means go ahead and block them.
But "bores" are often enough knowledgeable people in some areas, and drama-starters sometimes give an impulse where real discussion can take place. Also, authoritarians of all colors need to be called out, so that the probability of their propaganda taking root is reduced as much as possible.