No. if u r tkt remains in WL after chart, since it is E-tkt, it will b canceled automatically and d amount will b credited to your A/c in about 3 - 4 working days...
Please do not board d train in WL status u will b treated as tktless traveler and fined.
In case of counter tkt (PRS) tkt and remains in WL after charting you can travel in General coach...