Like others told, it isn't a big problem and shouldn't be truncated by default. It is needed especially when quoting but if the user who quotes doesn't like it, he/she can remove it.
While I agree that it would be a pain in the arse to scroll past nothing I have seen no one with the problem OP describes since 12/2013.
Any user(s) got banned or did he/she/they left?
It shouldn't be truncated by default. Report annoying posts with empty lines.
That is better!
~~MZ~~