I think the world will continue to evolve in leaps and bounds via the internet. With all technological advances, there are pros and cons, one being the capacity for abuse. I see new ways of hurting each other via "a click" everyday on the news. Bullying has taken a giant leap in cyberspace, resulting in suicides among vulnerable youth. Thieves, liars, cheats and pedophiles hide behind the anonymity that the internet allows. It offers easy access to the young, innocent, naive and uninitiated.
Comparatively speaking, ending a relationship with a text message is hurtful, but not as harmful as taking advantage of innocence, loneliness and gullibility. Generally, personal relationships evolve between two, consenting adults. As adults, we are responsible for our actions and reactions. I've seen programs, such as, "Dateline" and "48-Hours", where adults are duped by an internet relationship. My horror lies in, not what transpired, as much as the unearned, open trust given to virtual strangers along with affection, control over lives and often, money.
On the other side of the coin, by the time a real-life physical and emotional relationship exists between a man and woman, a breakup via text should not be a surprise. Usually, there are signs regarding a lack of honesty, courage and commitment before the breakup that the significant other chooses to ignore. I would say "live and learn" from the experience and thank your lucky stars the love interest was not a sociopath. In the case of unawareness, retrospectively, I would feel grateful that I got off only with a broken heart.