As much fun as it is to have a user named "Fluffy, Our Beloved Flopsy Bunny Friend", whenever somebody with such a massive name posts it makes the forum display hard to read. This effect is especially pronounced on small monitors. Could you please either crop names to a sane length, or add an option so users may opt to do so?
But yeah, it is pretty annoying.
The really long names, like Fuzzy cumulonimbus cloud end up overlapping with the thread titles. I've had it happen on my laptop.
Keep in mind that there are two columns a long name can occupy. For example, recently both columns were taken by long names in D&D, and the actual title column was reduced to ~200px.