Coming to a forum and interacting with others isn't bad in itself. If it begins to take precedence over real live interaction with family and friends I can see it being an issue, but in the meantime it's fine. The stigma that gets attached to it is the image so many people have of overweight, hairy middle-aged men with an attraction to teens and a love of WoW. People who prefer to sit in a dark corner of a basement (theirs or their mother's) rather than actual human interaction are the sad ones, not normal people who simply choose to forego a hobby or TV time to interact w peeps on MR.
I have few friends but the ones I have are very close, almost too many good acquaintances, am fit also (thx, Abstract), have a dream job (for me, at least), a close family, a cat who loves me, and I'm confident enough in myself and independent (in the good way) that I'm satisfied w my own company if there's no body else around. Sometimes I get out and about just to interact with people on a human level. I enjoy it.
I come here for tech support, fun, and interaction. I'm intelligent, look like David Tennant with a less pointy chin, and have a good grasp of organization and language. More importantly, I have hope. Life is what you make of it; if it doesn't fit, you make alterations. Am I sad? No.