We can see Paul in Acts "taking up a serpent" and he just brushed it into the fire. There have been many testimonies of people having drunk something by accident that did them no harm.
Those people that are handling snakes and drinking poison on purpose are being presumptuous and they die!
The words of Jesus in Mark 16 only come true to "those that believe".
The Greek scholars - the "ones" that say the long ending in Mark is "likely" added on is by those that don't believe in the gifts of the Spirit are for today - especially tongues - it's funny how that always goes and seems to be the case...eh?
Unfortunately I'm thinking Roger that if the Lord Himself walked in your room one night and told you that the gifts of the Spirit are still for today and they are meant to bless you and to help others - you would still tell Him they aren't and that you don't believe it.
There are only three gifts that have ceased. The rest continue but tongues were never for the Gentiles but for unsaved Jews. Do you believe that tongues are human languages or unknowable to human minds?
1 Cor 14:21 ¶ In the law it is written, With men of other tongues and other lips will I speak unto this people; and yet for all that will they not hear me, saith the Lord.
22 Wherefore tongues are for a sign, not to them that believe, but to them that believe not: but prophesying serveth not for them that believe not, but for them which believe.
23 If therefore the whole church be come together into one place, and all speak with tongues, and there come in those that are unlearned, or unbelievers, will they not say that ye are mad?
The this people in the verse is Israel not the Gentiles. It is also clear that the tongues are human languages in this passage. Paul is bringing to mind the captivity of Israel in the past.
For the cause of Christ
Roger