In the study edition of the WT for July 2014 - Jehovah's people 'renounce unrighteousness' - paragraph 13 reads:
13 The Bible principles discussed above do not apply only to our choice of entertainment. Opinions about dress and grooming, health and nutrition, and other personal matters may also trigger controversy. Accordingly, if no Scriptural principle is being violated, Jehovah’s people wisely abstain from arguing over such matters, “for a slave of the Lord does not need to fight, but needs to be gentle [tactful, ftn.] toward all.” — 2 Tim. 2:24 .
I bet they would be able to say that they do not interfere with 'grooming' issues such as growing beard, while still segregating those who dare to have one, as it is clear in the following section 'avoid bad associations!'