I am against what Professor X did to her. At least, the way he just stuck them in instantly without tryign any other method.
When he first met her, she seemed control and together. She wasn't floating stuff around the house uncontrollably (as she was in the present day) and she wasn't off destroying things, controlling peoples mind, and anything else for her ownpersonal gain. As far as we saw, everything was quite normal considering the immense power Jean had. Yes, we saw her float most everything in the street, but this was probably one of the only times she had ever done anything like this, or at least show-cased her powers in public.
A few things can be attrubuted to this theory;
a) the fact that the neighbours and people in the street were totally surprised and in awe when it happened, giving the impression that they had never seen anything like it before, ie: Jean had never used her powers to that extent, at least in her neighbourhood.
b) The family were seemingly living a calm, peaceful life. If Jean was using her powers willy-nilly, I'm sure they would have had a much stressful life; police bashing down their door every 10 seconds, neighbours constantly complaining, tons of aggro from people, Jeans parents going bald with stress, young Jean probably lashing out at the people making her life and her parents lives a misery, but no. All was calm. Her parents, though confused, seemed fine. Jean was fine. She was up in her bedroom when Xavier and Eric called round, seemingly not causing any problems at all.
My feeling is that as soon as Xavier saw what she was capable of, he seemed to just lunge at the chance to put the mental blocks in and control her, even though she showed no sign of needing to be controlled or being overwhelmed by her power.
Xavier could have talked to her. Taught her how to control her power. Tried to teach her right from wrong and the ethics of using her powers on other people. Afterall, she grew up to be Jean Grey (which was her natural personality) so we know she is intelligent and caring and would probably heed the Professors lessons.
But if this was not the case, The Professor could have tried simple things, such as maybe only blocking out her "arrogant" nature when she was a child. Surely he would be capable of this.
If the worst came to the worst, he could have introduced the blocks, yet worked at her power, slowly taking out the blocks, letting her take back her power, bit by bit.
Afterall, from what we saw, Jean did not need to learn to control her powers, because she could control them fine and dandy considering what we saw of her as a child. All Xavier really needed to do was teach her the ethics of using her powers.
I just find it so saddening that he simply violated her mind, caged her, and then simply did nothing whatsoever, causing Jean do develop a mental disability and yet he still did nothing!
Then when Phoenix, the bad[/i] personality that he basically created, finally takes a hold, what does the Professor think is the right thing to do? Thats right, put the blocks back into her head! Problem solved! Yes alas, she was too powerful for you now old man, and more than that, she was hella pissed! nd then she killed you.
Talk about bringing it on yourself.