Yes thats a fact.
Well , afraid , if you're affraid , most mediums say that if you're afraid , they know that and this is for ghosts a easy pick , only by bad features can cause this some acute symptoms , other use this just to , how do i say this, charge them .
We all have some sort of wall around us , a energy shield and this can weaken or be stronger as the way you should think it changes .
But however bad features only exists on history stories when they died there on place delict .
Or u may be in a serious bad angry depression , however .
Others just uhm "fly' around and don't do anny harm if you don't want contact with them
Only if they think that you're on theyr territories they gonna give you a sign if they don't like it or they give you a cold rare feeling? and if you ignore them they could get a little angry because you don't believe actually , and they want to contact you in a way (yes i read already alot :-) ) .
i had that with the old house of my grandfather , really strange feeling.
But however they don't do anny harm , like u said to be open for new things , just do it and don't be affraid , trust me .
And even if you're a lill scare even that won't attract them :-).
well im no medium but i've read alot of this stuff (Lol)
excuse me for being off topic !