But their entire reason for to be is to role-play and be somewhat of a robo-psych/robo-bro, and it didn't seemed to me, that here were any sort of meme about "Peacekeeper" borgs . Clown also is a meme and generally useless to the crew, according to that logic. They meant for the people that like to socialise and RP in the game, from mechanical stand point, service borg are too useless.
About the sprite, that not a real argument, when it comes to deciding, if it should be added, it just your opinion. And in my opinion, it fits their nature of being safe, round cushion for people, when there are some tension in the room. We should more focus on their uses on the server. As for being "obnoxious", well take away "Human harm" module, fine, if you think that all what people gonna use it for is to annoy everyone, because it's clearly what people do with any other intrusive type like security borgs, who spam "Halt!" all day long...