I rarely down-vote, but from the guidelines found here: http://ycombinator.com/newsguidelines.html

    In Comments

    ....

    When disagreeing, please reply to the argument instead
    of calling names. E.g. "That is an idiotic thing to
    say; 1 + 1 is 2, not 3" can be shortened to "1 + 1 is
    2, not 3." 

There is no need to imply that someone is on drugs to be making an assertion with which you disagree, and the antagonistic tone tends to create argument and not discussion. Perhaps better would be to ask for the reasoning behind the position held.

"I would've thought that iPhones do belong to the consumer electronics category. Could you explain otherwise?"

Such an open question tends to foster constructive discussion.

Your point needs answering, but I suggest there are better ways to make it.

http://www.penzba.co.uk/SoothSayer.html