The phrase "register their protest" is correct and can be used in written English.
It can be used to describe a scenario in which individuals take some kind of action to make their disagreement or disapproval known. For example, "Hundreds of citizens registered their protest by marching in the streets."
Stubborn English folk found small ways to register their protest.
Villagers said they had only wanted to demonstrate on the main road, to register their protest.
Oh yes, too busy buying a Pre-Schoolers Interactive Alphabet Base to register their protest.
In Islamabad, lawmakers belonging to M.Q.M boycotted the proceedings of the national assembly to register their protest.
"They are under pressure and they have decided to register their protest in these novel forms," he said.
Gautam John, a trained lawyer who now strategizes for nonprofits, started the petition on Tuesday to offer citizens a space to register their protest.
In Colorado Springs this morning, the Rev. Canon Donald Armstrong, a conservative cleric who opposes Bishop-elect Robinson's appointment, gave his parishioners an opportunity to register their protests.
You can see that when you walk around Athens's central Syntagma Square, where young people now gather every evening to debate the crisis and register their protests at the future being imposed on them.
If the legislature won't act unprompted — and the initial signs are that most of the G.O.P. intends to yield to the President's abuse of his power — it will be incumbent on the American people to register their protests forcefully, and to put pressure on their elected officials.
So the voters register their protests when given the chance, but otherwise remain stymied in their attempts to crystallize an opinion of what solution they ultimately want.
Many were registering their protest at an economy that has averaged one year of growth over the past five decades.
