You do have a right to be worried about your sons. They will be, especially in Ibiza, exposed to drugs such as E, K, C etc.... And to be honest, as a parent this is something you will in your own mind have to deal with.
Speaking as someone who has completely come out to their parents about their lifestyle, the best advice I can gove you is to read up on the effects of drugs (all of them) - and be cool with it. Try and discuss it openly before you go - explain that you are unhappy with the thought of your boys taking drugs, and why..... Just saying "its wrong" or "its illegal" won't do. In fact any form of prohibition trying to stop your sons from taking drugs may have the opposite effect - and they will be more curious to find out what these mystical tablets do to you. E (pills) have an amazing effect on the mind and body. To be honest, if my mmum was in better health I'd insisit she took one to feel the "benefits" of the drug.
To try and prevent your boys from taking them, purely on traditional parental lines does not really work. You have to accept that the possibilty of your sons taking drugs is real, and Ibiza is the place where it is more likely to happen from what I've judged so far.
The best way to discourage your boys from pilling is to read up and be more knowledgeable about drugs than them. which means trawling through the internet, researching on the net, asking questions, finding local drug agencies etc etc..... a good place to start is
www.aromadome.com - (sorry it's gay) but to be honest its quite frank about drug use....
above all, don't make drugs a taboo subject. When I came out to my mum about being gay, I also hit her with the drugs thing. From a child's point of view, I'd much rather have a mother who is "cool" about the whole drugs thing, can cope with me on a comedown - can and will talk openly about the risks involved with drugs, and be adult about the whole thing rather than my dad (and to be honest stepdad too) for whom the subject is totally taboo.
Being mature about your kids drug taking is much more likely to result in them respecting you and your advice as a parent than flying off the handle and losing the plot over it....
And please, please, please NEVER just assume that your eldest takingone pill will lead to him being a Heroine addict... The amount of people I have come across that cannot make the distinction between DRUGS and JUNKIES is ridiculous
If you need any further advice, or want to give me a call e-mail me!!!
rob xxx