If the spam filter is anything like the "naughty word" filter, then spaces dont matter at all. "WESELLGIL" is going to have the same filter as "W E S E L L G I L" or even "WE S ELL G IL". The only way to break the filter is to use non-letter icons like the $ unless programmed in specifically (which they have now), or numbers instead of letters (which shouldnt be that hard either).
Too much filtering is going to make it impossible for regular people to even have a conversation. They had this at first when it was implemented... dreadful. Glad they chose to code it a little better right after.