[pct-l] Graffiti - harmful or harmless?

[Len Glassner]

Here's another thing to berate thru-hikers about:

http://trailjournals.com/photos.cfm?id=525649

I take it that the above photo is from the I-10 underpass.

'Quizmaster' last year who wrote clever stuff on a lot of the trail
markers in sections A and B.  This person stopped at I-10 and promised
to be back for the next couple of sections this year.  Several
advocated cleaning the markers with alcohol.  Can anyone say whether
all that Q&A is still out there?
-- 
'Quotation is a serviceable substitute for wit' - Oscar Wilde

Sent from home by my carrier pigeon.