For instance, sometimes I want to search for all posts which mention
security, however when I put that into the search it immediately puts these
 around it and searches for all posts with that tag instead. Now in some cases this may be useful, however not all those who put the word
security into their post have also put the security tag, so then it becomes impossible to search for those posts without that tag, but with that word in them.
And of course I was just using
security as an example, I find this incredibly annoying when searching for any word which is also the name of a tag when I am not looking for all the posts that have that tag, but rather just that word.
So I suggest that there should either be an override such as putting, say
--- before and after the word like this in the search
---security--- so that it doesn't treat it as a tag, or if one does not put the word in
 in the search, for it to perhaps suggest those tags, or tell you that in order to search for tags you have to put the
 around each one, but not to actually automatically do it for you and thus prevent you from just searching for the word normally, rather than as a tag.