You can ask...just not in ALL CAPS.Not only is it quite annoying it is against the rules and has an opposite effect than the one you are looking for.
Posting in all caps is like screaming at someone at the top of your lungs...you might get someone's attention but they won't be listening to what you are actually saying...or in this case read what you are actually typing.
In answer to your question...Have you ever watched Maximum Overdrive?Sewers are a great way to sneak around undetected.
Someone may actually think to look in the sewer for you...but do they really want to?
If someone is willing to chase you into a sewer you must have made him or her or them very,very angry.