Such fears prevent some employees from expressing an opinion.

What do you think of the Egypt government blocking social networks to prevent people from expressing their opinions?

You can't prevent the people from expressing their feelings.

But this should not prevent us from expressing our sympathy and support for Spain in these rocky times.

It claims that separation of church and state is used to prevent Christians from expressing their beliefs.

Spending limits don't prevent anyone from expressing an opinion.

Often, being nice prevents me from expressing negative feelings toward others.

Being nice often prevents me from expressing negative feelings toward others.

Of course, this does not prevent us from expressing our deep sympathy with the American people and especially the families affected.

Does it mean perhaps preventing all citizens from publicly expressing their religion?