EasySocial Stream - Emoji's display as '????'

Hello,

When users post emoji's from their iPhone's they often display in the stream as '????" making the comment look like we're asking a question.

Here (and attached) are two link examples:
http://www.bsmartguide.com/connect/stream/item/8372.html
http://www.bsmartguide.com/connect/stream/item/8398.html

Would it be possible for unrecognized emoji's to appear blank instead of the '????' ?

The questions marks only come across as untented offensive.

Thank you!