There are some questionable filtered and unfiltered words.
For example, you can't say "ass", but can say "damn", "squeak", "bastard", and "vaginal wart". You can still say "sh*t". And you can use most racist epithets.
You can also still swear in foreign languages.
If they tighten the parser, you could get censored due to typos or hitting words containing the key strings (like "help, I'm running low on gass[sic]" [contains "ass"], or "Hello!" [contains "hell"])
I was really surprised I got censored for saying "how did you stay on my bellybutton for so long?", but I could get away with "You chute shooting squeak!".
So we've opened a Pandora's box of:
a) What words are acceptable or not (we censor "ass"... but "bastard" isn't... how about "jap"?)
b) How to catch them reliably without censoring unfairly.
At this point, every time I'm on the radio, I'm afraid of censor because after the "ass"/"squeak" incident, I have no idea what's right and wrong anymore. Every time I type it's like driving on a freeway with a cop behind me: if I change lanes, is this guy gonna take offense for a double-lane change; not leaving my blinker on long enough; going too slow; going too fast?