E cigs are a problem for everyone.
For many reasons.
From the RUCHNIUS spiritual perspective each puff the person is doing the sin of nit keeping the commandment of vnishmartem meod…. To watch your health… Plus anyone who can be seeing you smoke and can cause them to C”V start smoking you just sinned the sin of Lifnei eiver… Causing another person to sin. Plus many other sins to many to mention.
From the physical perspective. Its bad for your health even if your friends might try to convince you that its not as bad as real cigarettes. From the age of bochrim it can get you into lots of trouble in Yeshiva and also affect your shidduchim when you get older and its definitely not worth it.
Find something else to do instead of e cigs that wont effect your name and health and friendship with people around you.