Is there a particular situation or circumstance which you have in mind with this question? As a former college chaplain in a multifaith context, it was my responsibility to both promote a free exchange of ideas while simultaneously protecting the rights of all within an academic community. This meant that any religious group had the right to gather, publicize their events, beliefs, etc. What was not allowed was coercize or aggressive evangelism? Thus, if you were a Christian group who wanted to give out Bibles in the student center, you could have a table display as well as individuals asking people if they would like to take a testament. If the person said no or no thank you, you then had to respect their wishes. You could not go after them, you could not harass them, etc. You had to respect their wish to reject your offer.
To my mind, this allows for the freedom of expression while protecting the rights of individuals.