Very long user names need to be forced to wrap

[sterndata]

Very long (abusively long) user names don't wrap and break page formatting. See attachment.

I suggest adding CSS to force wrapping:

span.bbp-author-name {
    word-break: break-all;
}

[coffee2code]

In 11131:

Support Theme: Force excessively long usernames to break within container and not overflow container.

Props sterndata, coffee2code.
Fixes #5776.