Or upload them to some image service (iphoto, tumblr, picasa, imgur, etc) and link to that.
The only real reason to host images at TFL is if you think the image is going to be taken down from those services. vbulletin can do it, but why? It's one more place you have to go to manage images. There are apps for uploading to major imagehosting services that are easier to use than uploading to TFL.
“The egg hatched...” “...the egg hatched... and a hundred baby spiders came out...” (blade runner)
“Who are you?” “A friend. I'm here to prevent you from making a mistake.” “You have no idea what I'm doing here, friend.” “In specific terms, no, but I swore an oath to protect the world...” (continuum)
“It's a goal you won't understand until later. Your job is to make sure he doesn't achieve the goal.” (bsg)