On the negative polarity here on earth.

[Ankh]

I don't think that is possible to infringe on someone else's free will by sending them love... I recall having read somewhere that if you send someone love and the entity does not accept it, the energy goes elsewhere where it is needed or "return to sender", which would not be too bad either

In the case of negative entities- especially highly evolved ones- the "return to sender" function might come along with an additional surprise.

and what would that surprise be? what could harm you if you are in a state of love?

You're right! Ra said that "...to the pure, all that is encountered speaks of the love and the light of the One Infinite Creator. The cruelest blow is seen with an ambiance of challenges offered and opportunities to come. Thusly, the great pitch of light is held high above such an one so that all interpretation may be seen to be protected by light." And if one is in a state of love, as you said, a constant state of love, then what's there to be afraid of...?

I don't believe in those so-called negative greetings. If there is negativity I am usually able to trace it within myself, instead of blaming it on some outside "evil" source.

Lol!! You're awesome!!