There are three general rules for dealing with other peoples faults.
1. Is it a matter of mortal sin?
If it is not, there is less reason to object; if it is, you may be required to.
2. Do you have influence with the person?
If you are their superior, you must speak up. If you are near equal, you must use your judgement. I you are the inferior, you must be very careful.
3. Will it make the situation better if you object? Will it be worse?
If the person is acting out of ignorance or weakness, they will likely listen. If they are acting through malice, they may do worse to spite you.
In dealing with charges of hypocrisy,remind them that Christ and His law are the standard; not you.
We are all sinners and you are just reminding them of the same commandments that you both must follow.