In my lifetime of 19 years, I have seen dozens of families leave the UPC over just this issue alone. Until about a year ago, I would have dismissed your website as one done by someone with a personal vendetta against the UPC, or even worse, a backslidden heretic who only wanted to draw others deeper into sin. I began to do my own personal Bible study on this and other issues. I do not believe that it is wrong to trim hair. Trimmed hair is healthier and has more life and is generally more attractive.
Untrimmed hair tends to look unkempt and scraggly.
Not attractive at all. It gives the appearance of poverty. A woman that has the identical haircut as her husband, on the other hand, is pushing things too far. The Bible says to do all things in moderation. I personally have trimmed my hair for years.