I'm a moderator on one of the largest 3d printing websites and we are very proactive about discouraging users who make snarky and belittling comments about posts. Forums should be a safe place to discuss "anything" that pertains to the product without fear of being ridiculed or challenged as long is the post does not break the forums rules about decorum, decency and content.
There are so many forums on the web that have devolved into a bunch of adolescents swearing at and chiding each other and they ruin the forums. Keeping a forum open, powerful and professional takes a lot of work from all of we users. We all need to try to put ourselves in other's shoes. Many new users come here to learn. Sure, they post some odd things and often have terrible subjects, but, they learn and 100's of posts later they are valuable assets to the community.
I would ask all users to be respectful, patient and sometimes silent when tempted to respond to posts that are uninteresting to them. We aren't forced to respond to every post we read. Sometimes it's OK to let users ramble and be obtuse and get out what they need to. Being tolerant makes the forum a safer, more open and more useful tool.