I think people are missing the point, here. There's nothing wrong with a creative welcome message (as long as it's not ridiculously long), but one should not post just to "beam" a newcomer unless it's in a basic "Hi, I'm new here" kind of topic:
If they are asking a question or need help with some problem (and many newcomers do), the main priority is to make them feel welcome by answering the question or solving their problem - Only after that should you worry about the welcome beam and associated message. Barraging them with posts that are essentially useless when they came here seeking help has the exact opposite effect of a welcome - It may garner a few laughs and bring out old memories for you, but remember that a welcome post should not be for your benefit, but for the benefit of the newcomer, and asking a question only to get beamed 5 times with no answer is not very welcoming.
Needless to say, considering what I just wrote, I definitely support this.