I didn't bother to hide the surprise on my face.

Though why they bothered to hide her, I don't know.

"Why bother to hide her if she was so easy to find?"

Silence looked about him, not bothering to hide his interest.

So, why bother to hide how he felt toward her?

Whatever was out there wasn't bothering to hide its coming.

His face said so, and he didn't bother to hide it.

He didn't bother to hide the doubt in his voice.

The man does not even bother to hide the assault.

In short, they no longer bothered to hide themselves and thus were easily found.