SecFilterEngine Off - Joomla! Forum - community, help and support

hello,
after enabling standard core sef in joomla 1.0.12 discovered regular content gave
a server error 500 , page wouldn't show . (links components work)
the url like:

http://www.mysite.com/content/view/19/27/  .

i tried possible settings in .htaccess, without success.
i dicovered when removed last '/' in url , so

http://www.mysite.com/content/view/19/27

the page turn up, couldn't figure out how fix it.

finally found possible solution on forum. if i  included 'secfilterengine off' in .htaccess should be  working.
and indeed, working. question have , including 'secfilterengine off' in .htaccess file,
isn't creating serious security issue ?

thanks in advance ,  chris