FWIW, I've installed both wxPerl and Komodo on several Linux system without installing Activestate's perl on it, without issue. Komodo generally detects the version of perl running on your system correctly. As for wx, if you are on a debian based system, that's as easy as:
$ sudo apt-get install libwx-perl
If you're on another flavor of linux there are RPMs of Wx or you can install from source with CPAN.
Almost every disto I've worked with comes with perl installed. Often this is because they include system tools, cron jobs,or utilities that are written in perl, so definitely avoid blowing away the default perl.